prevention of age-related macular degeneration (AMD). While the total synthesis of 1 has been previously reported in a poor overall yield, the total synthesis of the other seven stereoisomers of lutein has not yet been accomplished. We have developed a relatively straightforward methodology for the total synthesis of 1 and three of its stereoisomers, (3R,3′S,6′S)-lutein (2), (3R,3′S,6′R)-lutein or 3′-epilutein
(3 - [R,3' - [R,6' - [R)-Lutein(1)是主要的膳食类
胡萝卜素是一种大多数
水果和蔬菜在美国普遍食用,而且人血浆,主要器官和眼组织中积累了丰富的。大量的流行病学和实验研究表明1具有重要的
生物学活性,并且在预防老年性黄斑变性(
AMD)中可能起重要作用。虽然以前已经报道了1的总合成,但是总收率却很低,但
叶黄素其他7种立体异构体的总合成尚未完成。我们已经开发出一种相对简单的方法来进行1的全合成和三个其立体异构体,(3 - [R,3'小号,6'小号)-lutein(2),(3 - [R,3'小号,6' - [R)-lutein或3'-表
叶黄素(3),和(3 [R,3' - [R,6'小号)-lutein(4由C)15 + C 10个+ C 15维悌希偶联反应。利用这种方法,可以类似地制备与上述
叶黄素异构体对映异构的
叶黄素的其他四种立体异构体。该策略的重要特征之一是其在13